IDW11120
Australian Government Bureau of Meteorology
Western Australia
Issued at 1:01 pm WST on Monday 20 July 2026
for the period until midnight WST Thursday 23 July 2026.
Please be aware
Wind and wave forecasts are averages. Wind gusts can be 40 per cent stronger than the forecast, and stronger still in squalls and thunderstorms. Maximum waves can be twice the forecast height.
A ridge over central Australia maintains a moderate east to southeasterly flow over most of the north. Winds freshen mid week as a new ridge develops to the south and strengthens.
Winds: Northeast to southeasterly 15 to 20 knots. Seas: 1 to 1.5 metres, decreasing to 1 metre by early evening. Swell: Westerly below 1 metre. Weather: Sunny.
Winds: East to southeasterly 15 to 20 knots. Seas: Around 1 metre, increasing to 1 to 1.5 metres east of Kalumburu during the morning. Swell: Westerly below 1 metre. Weather: Sunny.
Winds: South to southeasterly 10 to 15 knots tending east to southeasterly 15 to 20 knots before dawn then becoming variable about 10 knots in the late evening. Seas: Around 1 metre. Swell: East to northeasterly below 1 metre. Weather: Sunny.
Winds: South to southeasterly 10 to 15 knots tending east to southeasterly 15 to 20 knots during the morning. Seas: Around 1 metre, increasing to 1 to 1.5 metres east of Kalumburu during the morning. Swell: Northeasterly below 1 metre. Weather: Sunny.
Winds: East to northeasterly 10 to 15 knots becoming variable about 10 knots in the early afternoon. Seas: Below 1 metre. Swell: Westerly below 1 metre. Weather: Sunny.
Winds: South to southeasterly 10 to 15 knots tending east to southeasterly in the morning then tending southeast to southwesterly in the late afternoon. Winds reaching up to 20 knots offshore south of Broome in the late evening. Seas: Around 1 metre. Swell: Westerly below 1 metre. Weather: Sunny.
Winds: South to southeasterly 10 to 15 knots tending east to southeasterly 15 to 20 knots before dawn then tending south to southeasterly in the late evening. Seas: Around 1 metre, increasing to 1 to 1.5 metres during the morning, then decreasing below 1 metre during the afternoon. Swell: Westerly below 1 metre. Weather: Sunny.
Winds: Southeasterly 15 to 20 knots. Seas: 1 to 1.5 metres, decreasing below 1 metre during the afternoon or evening. Swell: Westerly below 1 metre. Weather: Sunny.
Winds: Northeast to southeasterly 10 to 15 knots becoming variable below 10 knots in the evening. Seas: Below 1 metre. Swell: Westerly below 1 metre. Weather: Sunny.
Winds: South to southeasterly 10 to 15 knots tending east to southeasterly in the morning then becoming variable about 10 knots in the evening. Seas: Around 1 metre. Swell: Westerly below 1 metre. Weather: Sunny.
Winds: Southeasterly 15 to 20 knots tending northeast to southeasterly in the middle of the day then becoming southeasterly 10 to 15 knots in the evening. Seas: Below 1 metre, increasing to 1 to 1.5 metres during the morning, then decreasing to 1 metre during the afternoon. Swell: North to northeasterly below 1 metre. Weather: Sunny.
Winds: Southeasterly 20 to 30 knots. Seas: Around 1 metre, increasing to 1.5 to 2.5 metres during the morning. Swell: North to northeasterly below 1 metre. Weather: Sunny.
Winds: Variable about 10 knots, reaching up to 20 knots west of Onslow in the late evening. Seas: Below 1 metre. Swell: West to southwesterly around 1 metre inshore, increasing to 1.5 to 2 metres about offshore western waters. Weather: Sunny.
Winds: South to southeasterly 10 to 15 knots, reaching up to 20 knots offshore west of Onslow during the morning. Winds becoming variable about 10 knots in the early afternoon then becoming northwest to southwesterly 10 to 15 knots in the late evening. Seas: Around 1 metre, increasing to 1 to 1.5 metres during the morning, then decreasing to 1 metre around midday. Swell: West to southwesterly around 1 metre inshore, increasing to 1 to 1.5 metres about offshore western waters. Weather: Sunny.
Winds: South to southeasterly 15 to 20 knots tending northeast to southeasterly in the morning then becoming variable about 10 knots in the evening. Seas: Around 1 metre. Swell: West to southwesterly around 1 metre offshore. Weather: Sunny.
Winds: East to southeasterly 15 to 25 knots tending east to northeasterly 15 to 20 knots during the afternoon then tending east to southeasterly 10 to 15 knots during the evening. Seas: Around 1 metre, increasing to 1 to 2 metres offshore during the morning. 1st Swell: West to southwesterly around 1 metre offshore. 2nd Swell: East to northeasterly around 1 metre inshore, increasing to 1 to 1.5 metres about offshore western waters during the afternoon or evening. Weather: Sunny.
The next routine forecast will be issued at 7:01 pm WST Monday.
* Calls to 1300 numbers cost around 27.5c incl. GST, higher from mobiles or public phones. Marine forecasts are also available on VHF and HF radio. View the radio schedule on www.bom.gov.au/marine
Check the latest Coastal Waters Forecasts for information on wind, wave and weather conditions for neighbouring coastal zones